The paper begins by outlining the role and importance of coal as a source of energy and in the steel industry. It briefly describes the longwall method of working together with the conventional machinery used in the method. A mathematical model is then proposed that shows the relationship between the gradient of the coal seam, that of the face and the entries to the panel. Determination of a mo...

Competition among companies is growing globally, with the need to increase productivity and efficiency in product sector. However, there also a concern about global warming depletion of natural resources, as well their effects on human health. In this context, all activities that involve intense usage resources must take into account sustainability one decision criteria. This work presents appl...

The mining industry is one of the main industries that determine country’s energy sovereignty. This article studies effectiveness organizational and managerial decision making, a separate subdivision Minetech Machinery LLC, an official dealer equipment from Hitachi, on territory Russian Federation.

OBJECTIVES To assess rates and patterns of agricultural machinery injuries in farm children in order to both determine priorities and develop strategies for injury control in this population. METHODS Coroners' files and hospital discharge data were examined for Ontario farm children aged 0-19 who had agricultural machinery injuries over a five year period ending 31 March 1990. Injury rates we...